25013: Updating the username is unsupported

You attempted to update a username value on a resource that does not support username changes after creation. Use a different updatable field if you need to modify the user record.

• Your request includes a username field in an update operation.
• The resource supports creating a username but does not support changing it later.
• Your application is reusing a create payload for an update request and includes immutable fields.

• Remove the username field from the update request and submit only fields that the resource allows you to change.
• Review the update operation for the resource you are using and confirm which parameters are writable.
• If you need a different username, create a new user or account record with the correct value and migrate your application to use that record.
• Update your application logic to treat username values as immutable after creation.

• Identity and Access Management overview